<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<div style="margin: 20px auto 20px auto;width: 1000px;height: 495px;background-color: #fff;">
    <div>
        <label>用户名</label>
        <input>
    </div>
    <div>
        <button type="submit" class="btn">提交</button>
    </div>
</div>